Patch set updated for coreboot: 552292a Intel GM45, 945, SNB: Move `multiply_to_tsc()` to `tsc.h`

[Paul Menzel]

Paul Menzel ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3242

-gerrit

commit 552292a5ad80c3fd37dcb001bce254a4211ed796
Author: Ronald G. Minnich 
Date:   Wed May 8 17:08:55 2013 +0200

Intel GM45, 945, SNB: Move `multiply_to_tsc()` to `tsc.h`

multiply_to_tsc was being copied everywhere, which is bad
    practice. Put it in the tsc.h include file where it belongs.
    Delete the copies of it.

Per secunet, no copyright notice is needed.

This might be a good time to get a copyright notice into tsc.h
    anyway.

Change-Id: Ied0013ad4b1a9e5e2b330614bb867fd806f9a407
    Signed-off-by: Ronald G. Minnich 
---
 src/include/cpu/x86/tsc.h                  | 13 +++++++++++++
 src/northbridge/intel/gm45/delay.c         | 12 ------------
 src/northbridge/intel/i945/udelay.c        | 12 ------------
 src/northbridge/intel/sandybridge/udelay.c | 13 -------------
 4 files changed, 13 insertions(+), 37 deletions(-)

diff --git a/src/include/cpu/x86/tsc.h b/src/include/cpu/x86/tsc.h
index 8e49a66..66451ad 100644
--- a/src/include/cpu/x86/tsc.h
+++ b/src/include/cpu/x86/tsc.h
@@ -27,6 +27,19 @@ static inline tsc_t rdtsc(void)
 }

#if !defined(__ROMCC__)
+/* Simple 32- to 64-bit multiplication. Uses 16-bit words to avoid overflow.
+ * This code is used to prevent use of libgcc's umoddi3.
+ */
+static inline void multiply_to_tsc(tsc_t *const tsc, const u32 a, const u32 b)
+{
+	tsc->lo = (a & 0xffff) * (b & 0xffff);
+	tsc->hi = ((tsc->lo >> 16)
+		+ ((a & 0xffff) * (b >> 16))
+		+ ((b & 0xffff) * (a >> 16)));
+	tsc->lo = ((tsc->hi & 0xffff) << 16) | (tsc->lo & 0xffff);
+	tsc->hi = ((a >> 16) * (b >> 16)) + (tsc->hi >> 16);
+}
+
 /* Too many registers for ROMCC */
 static inline unsigned long long rdtscll(void)
 {
diff --git a/src/northbridge/intel/gm45/delay.c b/src/northbridge/intel/gm45/delay.c
index 9f49c6e..a861e25 100644
--- a/src/northbridge/intel/gm45/delay.c
+++ b/src/northbridge/intel/gm45/delay.c
@@ -2,7 +2,6 @@
  * This file is part of the coreboot project.
  *
  * Copyright (C) 2007-2008 coresystems GmbH
- *               2012 secunet Security Networks AG
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -24,17 +23,6 @@
 #include <cpu/intel/speedstep.h>
 #include "delay.h"

-/* Simple 32- to 64-bit multiplication. Uses 16-bit words to avoid overflow. */
-static inline void multiply_to_tsc(tsc_t *const tsc, const u32 a, const u32 b)
-{
-	tsc->lo = (a & 0xffff) * (b & 0xffff);
-	tsc->hi = ((tsc->lo >> 16)
-		   + ((a & 0xffff) * (b >> 16))
-		   + ((b & 0xffff) * (a >> 16)));
-	tsc->lo = ((tsc->hi & 0xffff) << 16) | (tsc->lo & 0xffff);
-	tsc->hi = ((a >> 16) * (b >> 16)) + (tsc->hi >> 16);
-}
-
 /**
  * Intel Core(tm) cpus always run the TSC at the maximum possible CPU clock
  */
diff --git a/src/northbridge/intel/i945/udelay.c b/src/northbridge/intel/i945/udelay.c
index 780c730..3d5d6c6 100644
--- a/src/northbridge/intel/i945/udelay.c
+++ b/src/northbridge/intel/i945/udelay.c
@@ -2,7 +2,6 @@
  * This file is part of the coreboot project.
  *
  * Copyright (C) 2007-2008 coresystems GmbH
- *               2012 secunet Security Networks AG
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -24,17 +23,6 @@
 #include <cpu/x86/msr.h>
 #include <cpu/intel/speedstep.h>

-/* Simple 32- to 64-bit multiplication. Uses 16-bit words to avoid overflow. */
-static inline void multiply_to_tsc(tsc_t *const tsc, const u32 a, const u32 b)
-{
-	tsc->lo = (a & 0xffff) * (b & 0xffff);
-	tsc->hi = ((tsc->lo >> 16)
-		   + ((a & 0xffff) * (b >> 16))
-		   + ((b & 0xffff) * (a >> 16)));
-	tsc->lo = ((tsc->hi & 0xffff) << 16) | (tsc->lo & 0xffff);
-	tsc->hi = ((a >> 16) * (b >> 16)) + (tsc->hi >> 16);
-}
-
 /**
  * Intel Core(tm) cpus always run the TSC at the maximum possible CPU clock
  */
diff --git a/src/northbridge/intel/sandybridge/udelay.c b/src/northbridge/intel/sandybridge/udelay.c
index 3edd69d..a2ce0d8 100644
--- a/src/northbridge/intel/sandybridge/udelay.c
+++ b/src/northbridge/intel/sandybridge/udelay.c
@@ -26,19 +26,6 @@
  * Intel SandyBridge/IvyBridge CPUs always run the TSC at BCLK=100MHz
  */

-/* Simple 32- to 64-bit multiplication. Uses 16-bit words to avoid overflow.
- * This code is used to prevent use of libgcc's umoddi3.
- */
-static inline void multiply_to_tsc(tsc_t *const tsc, const u32 a, const u32 b)
-{
-	tsc->lo = (a & 0xffff) * (b & 0xffff);
-	tsc->hi = ((tsc->lo >> 16)
-		+ ((a & 0xffff) * (b >> 16))
-		+ ((b & 0xffff) * (a >> 16)));
-	tsc->lo = ((tsc->hi & 0xffff) << 16) | (tsc->lo & 0xffff);
-	tsc->hi = ((a >> 16) * (b >> 16)) + (tsc->hi >> 16);
-}
-
 void udelay(u32 us)
 {
    u32 dword;